Method for detecting test pile stress and strain of PHC (Prestressed High-Strength Concrete) pipe pile

A technology of PHC pipe piles and test piles, which is applied in the direction of foundation structure testing, construction, foundation structure engineering, etc., and can solve the problems of difficulty in pre-embedding electrical sensors and limitations in the scope of use.

Inactive Publication Date: 2013-02-20
北京和理监测技术有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, conventional methods for detecting the stress and strain of pipe piles usually use embedded resistance strain gauges and embedded steel bar gauges. These electrical sensors will be affected by factors such as electromagnetic fields, temperature, hu...

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  • Method for detecting test pile stress and strain of PHC (Prestressed High-Strength Concrete) pipe pile

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Embodiment Construction

[0025] Below, refer to the attached figure 1 , the present invention will be described more fully, and exemplary embodiments of the present invention are shown in the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0026] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature relative to another element or feature shown in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned ...

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Abstract

The invention discloses a method for detecting a test pile stress and strain of a PHC (Prestressed High-Strength Concrete) pipe pile, and the method comprises the following specific steps of: 1) lofting: marking the positions of each detection point and routing on the surface of the PHC pipe pile; 2) grooving: grooving the PHC pipe pile along the lofting; 3) connecting line: connecting optical fiber grating sensors arranged according to the predetermined order by an optical fiber to form a detection line; 4) paying-off and testing: putting the detection line in the marked position in the groove and testing whether the optical fiber grating sensors work normally; 5) fixed routing: putting the detection line in the groove in a position which should be at least 5 mm lower than the surface of the PHC pipe pile; 6) glue preparation: pouring glue in the groove, and pasting the optical fiber grating sensors, thereby fixing the sensors; 7) detection: performing stress and strain detection by means of the optical fiber grating sensors and sending out the detection data through the optical fiber. According to the method, the advantages of the optical fiber grating sensors are utilized and combined with the characteristics of the armored optical fiber and a detection line is formed integrally, and the method has the advantages of simplicity, feasibility, high efficiency and the like.

Description

technical field [0001] The invention relates to the field of pile foundation construction detection, in particular to a method for detecting stress and strain in PHC pipe pile test piles based on distributed optical fiber grating sensors. Background technique [0002] At present, PHC pipe piles have been widely used in high-rise buildings, roads, bridges, ports, wharves and other projects, so it is of great significance to study the force transfer mechanism and failure law of PHC pipe piles under vertical load and horizontal load. In order to further study the working performance of PHC piles, it is necessary to carry out field load tests and detect the stress and strain of the pile body, so as to accurately obtain real-time detection data of PHC piles. [0003] At present, conventional methods for detecting the stress and strain of pipe piles usually use embedded resistance strain gauges and embedded steel bar gauges. These electrical sensors will be affected by factors suc...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 许利凯韩高彬侯岳峰
Owner 北京和理监测技术有限公司
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